Hey Zain
Yes, Graduate Certificate in Paralegal is a good option. Make sure, you apply for graduate certificate only and not diploma in paralegal.
Other options for law students include courses like-
Alternative Dispute Resolution
Master of Laws
Masters of Laws is quite costly as compared to graduate certificates. If you dont have any money constraints, then go for LLM as it will prepare you for NCA, most of the subjects are covered in LLM. You will have a degree instead of a certificate which will attract employers.
Talking about paralegal, it will allow you to practice as a licensed paralegal. You can also work as legal assistants in various law firms and under attorneys.
ADR is a specialized course, which you may opt if you want to work in this particular field.
I am LLB graduate from India with one year experience as Legal Assistant. I have got admission in Humber College for Paralegal Jan 2020. I have also got the visa.